The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 04, 2000
Filed:
Jun. 29, 1998
Applicant:
Inventor:
Wolfgang Kiel, Odenthal, DE;
Assignee:
Bayer Aktiengesellschaft, , US;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568362 ; 568309 ; 568376 ;
Abstract
Unsubstituted or substituted cyclohexanones are advantageously prepared by hydrogenation of the corresponding phenols in the presence of a palladium-on-carbon catalyst at from 100 to 250.degree. C. and from 1 to 20 bar of hydrogen pressure if the catalyst is mixed with a base component and from 20 to 200% by weight of water (based on the base component) and this mixture is used in the hydrogenation. For identical batches, this gives virtually identical hydrogenation times and virtually equally good yields of cyclohexanones.